1.
Kaley Cuoco (who played Penny) on her first red carpet in 2002:
Kaley Cuoco on her most recent red carpet:
And here’s a side by side:
2.
Johnny Galecki (who played Leonard Hofstadter) on his first red carpet in 1997:
Johnny Galecki on his most recent red carpet:
And here’s a side-by-side:
3.
Jim Parsons (who played Sheldon Cooper) on his first red carpet in 2005:
Jim Parsons on his most recent red carpet:
And here’s a side-by-side:
4.
Kunal Nayyar (who played Raj Koothrappali) on his first red carpet in 2007:
Kunal Nayyar on his most recent red carpet:
And here’s a side-by-side:
5.
Simon Helberg (who played Howard Wolowitz) on his first red carpet in 2007:
Simon Helberg on his most recent red carpet:
And here’s a side-by-side:
6.
Mayim Bialik (who played Amy Farrah Fowler) on her first red carpet in 1989:
Mayim Bialik on her most recent red carpet:
And here’s a side-by-side:
7.
Melissa Rauch (who played Bernadette Rostenkowski-Wolowitz) on her first red carpet in 2006:
Melissa Rauch on her most recent red carpet:
And here’s a side-by-side:
8.
Sara Gilbert (who played Leslie Winkle) on her first red carpet in 1989:
Sara Gilbert on her most recent red carpet:
And here’s a side-by-side:
9.
Kevin Sussman (who played Stuart Bloom) on his first red carpet in 2004:
Kevin Sussman on his most recent red carpet:
And here’s a side by side:
10.
Laura Spencer (who played Emily Sweeney) on her first red carpet in 2009:
Laura Spencer on her most recent red carpet:
And here’s a side-by-side:
11.
Christine Baranski (who played Leonard’s mom Beverly) on her first red carpet in 1995:
Christine Baranski on her most recent red carpet:
And here’s a side-by-side:
12.
Laurie Metcalf (who played Sheldon’s mom, Mary) on her first red carpet in 1993:
Laurie Metcalf on her most recent red carpet:
And here’s a side-by-side:
Source: https://www.buzzfeed.com/jenniferabidor/big-bang-theory-cast-then-now